Vehicle and like springs



C. W. N. SORENSEN VEHICLE AND LIKE SPRINGS Filed June 4. 1923 5 bazuw Patented May 20, 1924.

UNITED STATES CHARLES wALnEnMAR NORMAN son-ENs-EN, or HAMILTON, NEW ZEA'LANDQT VEHICLE AND LIKE SPRINGS.

Application filed .Tune 4, 1923. Serial No. 643,357.

To all whom it may concern. 7

Be it known that I, CHARLES iVALDEMIAR NORMAN SoRENsEN, subject of the King of Great Britain, residing at Brookfield Street, Hamilton; Dominion of New Zealand, have invented new and useful Improvements in Vehicle and Likelsprings, of which the following is a specification.

This invention relates to vehicle and like springs of the usual bow shapes and made up of a number of superimposed leaves. The invention has been devised with the object of providing improvements in the formations of the leaves going to make up the full spring, by means of which improvements the leaves are caused to be interlocked together in such a manner as to provide for the running road shocks and jolts being transmitted through the full length of the spring and thereby to ob 7 tain a more eflective springing result.

The invention is applicable to overslung and underslung springs of all kinds in which the leaf construction is embodied.

Various methods and constructions for interlocking the spring leaves have been suggested and some have been already patented and put into practice. Those hitherto employed have proved faulty in that they are difficult to form or have a tendency to slide under severe shocks, and also in their formation somewhat weaken the leaves.

In the present invention these disadvantages are overcome by the special form of interlocking connection between the leaves that has been devised.

The invention is illustrated in the accompanying drawings, in which Figure l is an elevation of an overslung spring constructed in accordance with this invention.

Figure 2 is a detail view of one of the spring leaves showing the manner of constructing it to adapt it for looking with the leaves respectively below and above it.

Figure 3 is an enlarged perspective view showing the manner of forming the recess member of the locking joint.

Figure 4% is a similar view of the ridge member of such joint.

. Figure 5 is a side elevation of an underslung spring, as constructed in accordance with this invention.

The invention consists in constructing the spring by a number of leaves A, assembled together and clamped in the usual way, but with each leaf formed in a particular manner to provide for it looking with the leaf or leaves next in order to it. This manner of forming each leaf consists in bend ing it across its full width so that a ridge B of angular shape is formed at an approved distance in from its end, and also in bending it across its width, at a point closer to its end, with a curved arch C forming a concave recess on its other side.

This arch is made of a height and width very slightly greater than the height and width of the ridge B. The arch will, however, not be required in the base leaf of.

the spring.

Thus, in the assembly of the diiferent leaves of the spring, to form a spring, the arch C of each leaf is placed over the ridge B of the leaf on to which it fits, while its own ridge B is covered by the arch C of the leaf riding on it. This causes the leaves to be locked together in the required manner so that they may creep and give beyond the locking point. The engagement of the lock is thus made throughout the full width of the leaf so that an effective joint is obtained.

In overslung springs, as shown in Figure 1, the leaves will preferably be interlocked only at their forward ends, with the exception of the top leaf, which also will be locked at its rear end. In underslung springs, as shown in Figure 5, all of the leaves will preferably be interlocked at their forward ends only.

I claim 1. In vehicle springs composed of a number of leaves assembled one on the other means for interlocking each leaf with that upon which it fits, consisting in forming one of the interlocking faces with a ridge of angular cross section projecting from it across the full width thereof, and in forming the other interlocking face with a recess of concave cross section extending transversely across its full width and adapted to fit closely over'the said ridge when the two faces are disposed in assembled contact, substantially as specified.

2. A vehicle spring formed by a number of leaves disposed one upon the other and made to interlock with one another by constructing each leaf with a ridge upon one face, shepecl .of angnlar cross-section endj extending across-its full Width, and with a recess upon its other face, of concave cross sectionwfa lsoextending aoross itsfull wiolth such lavesbeiiigassembled" so that the recess of one leaffits over the ridge of they 

